RFID Blocking Material: Most of cards are using RFID technology(Radio Frequency Identification), but,which become more risky in nowadays, thieves can scan your identity information by using a RFID reader secretly when you are in stores, airports, or crowded streets. This aluminum wallet can perfectly block unwanted RFID scanners, keep your cards safe, best for travel.Slim and Lightweight: Only 12mm and 80g weight, while has 6 card slots. Perfect for people who hates bulky traditional wallets and has limited pocket spacePolished Sturdy Metal: Made of quality aluminum and stainless steel materials from top manufacturer, the shiny finish of the card holder give itself a stylish robust look, very sturdy for daily use6 Card Slots: High quality PVC accordion design slots, easy for your cards in and out. Fits various types of cards: ID Card, Credit Card, Driver's Licenses, Medical Cards, etc.